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IAUC 7356: P/2000 B3; 1999ct, NO 1999cv; 2000C

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IAUC number

                                                  Circular No. 7356
Central Bureau for Astronomical Telegrams
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7244/7440/7444 (for emergency use only)

     An object with unusual motion that was reported as asteroidal
by LINEAR (discovery observation below) has been found to be
cometary in appearance following posting on the NEO Confirmation
Page.  CCD observations by P. Kusnirak (Ondrejov, 0.65-m f/3.6
reflector) on Feb. 1 show a coma diameter of 6" and a faint tail in
p.a. 120 deg, and F. Zoltowski (Edgewood, NM, 0.3-m f/3.3
reflector) reports a small faint tail about 30" long in p.a. 100
deg and a dense coma about 10" across.

     2000 UT             R.A. (2000) Decl.        m2
     Jan. 27.24052    6 29 47.84   +43 42 44.9   18.9

  The orbital elements given below were computed from the complete
set of astrometry given on MPEC 2000-C06:

     T = 2000 Feb. 14.533 TT          Peri. = 130.760
     e = 0.57590                      Node  = 352.128   2000.0
     q = 1.69866 AU                   Incl. =  11.120
       a =  4.00531 AU     n = 0.122956     P =   8.02 years

     A. Gal-Yam and D. Maoz, Tel Aviv University; and P.
Guhathakurta, University of California at Santa Cruz, report:  "A
spectrum of SN 1999ct (cf. IAUC 7210), obtained with the Keck-II
telescope (+ LRIS spectrograph, range 380-880 nm) on 1999 Aug. 6-7
by Guhathakurta reveals that SN 1999ct is of type Ia, then about 2
months past maximum brightness.  The derived redshift of 0.18 is
consistent with that of Abell 1697 (0.183).  A spectrum of SN
1999cv (ibid.), obtained by Guhathakurta at the same time with the
same instrument, is that of a typical active galactic nucleus at
redshift 0.797.  Broad emission lines of C IV (190.9 nm), Mg II
(279.8 nm), and H-beta (486.1 nm), and narrow lines of O III (495.9
and 500.7 nm), are observed.  We therefore conclude that this
object is not a supernova."

     Unfiltered CCD magnitudes:  Jan. 21.198 UT, 15.00 (M. Suarez,
Las Palmas, Canary Islands); 25.697, 14.8 (S. Yoshida and K.
Kadota, Ageo, Saitama, Japan).

                      (C) Copyright 2000 CBAT
2000 February 2                (7356)            Daniel W. E. Green

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